From 2009 to 2011 I worked with a print lab in Austin, Texas, profiling their ZBE Chromira 50" laser printer. The printer was large, but dwarfed by the continuous RA-4 continuous process system behind it. It was easy enough to profile, once one figured out how to completely turn off color management at the printer processor, and let Photoshop do the heavy lifting in a separate pc.
As I remember it was rated at 300 dpi, did a decent job as long as calibration (complicated process involving both the printer and RA-4 process parameters) was properly performed. Competition from large ink jet printers was not as stiff then, although the lab found that they were a whole lot less hassle. There was a dedicated group of photographers that preferred the look, and at that time they could obtain larger prints using the Chromira.
I downloaded the L-Type profiles, compared their gamut volumes to the ones I did for the Chromira. The L-Type ran in the 400K+ range (using ColorThink Pro), and the custom Chromira profiles were 500K+, both significantly less for comparable media as compared to today's ink jet papers.
Not trying to disparage the L-Type prints, but this thread does bring back some of the early CD vs. vinyl discussions.
Richard Southworth